$(function(){

  $(".contentone").click(function(){
   $("#project").css("display","none");
   $("#contact").css("display","none");
   $("#slideintroduce").css("display","block");
   })
  
  $(".contenttwo").click(function(){
  $("#slideintroduce").css("display","none");
  $("#contact").css("display","none");
  $("#project").css("display","block");
 })
   
   $(".contentthree").click(function(){
  $("#slideintroduce").css("display","none");
  $("#project").css("display","none");
 $("#contact").css("display","block");
 })

 
 




})